Temperature and reduced pH regulate stress and biomineralization gene expression in larvae and post-larvae of the sand dollar Dendraster excentricus DOI
Tatiana N. Olivares-Bañuelos,

C.M. Gómez-Gutiérrez,

L.L. García-Echauri

et al.

Marine Biology Research, Journal Year: 2022, Volume and Issue: 18(3-4), P. 187 - 202

Published: April 21, 2022

Seawater temperature, oxygen, salinity and pH are important abiotic factors, changes in which can generate stress marine organisms. Subtidal intertidal species, such as the sand dollar Dendraster excentricus, daily exposed to stressors against they have developed survival mechanisms face environmental challenges. Analysing expression of some key genes response factors due temperature pH, especially early stages development, opens a window knowledge on effect that these benthos In present work larvae post-larvae D. excentricus were high low scenarios. Survival, size gene five genes, involved both (hsp70 IV hsp90 beta-like) biomineralization for skeletogenesis (sm29, sm30A, carbonic anhydrase 14-like mitochondrial proton/calcium exchanger protein LOC575637), analysed 4-, 6-, 8-arms, competent post-larvae. Survival stressed presented significant decrease, up 37% stages. A reduction almost 30 μm was observed when stressful conditions, except where no detected. After treatments, transcripts beta-like up-regulated all larval but hsp70 not. Under tested conditions sm29 sm30A down-regulated post-larvae, while LOC575637 expressions up-regulated. It is evident tolerance seawater has direct metabolic functions depends developmental stage. If laboratory results extrapolated ecosystems, it possible populations this structuring organism may be disturbed with subsequent damage ecosystem balance, until resilient organisms acclimatize adapt their changing habitats.

Language: Английский

Juvenile waiting stage crown‐of‐thorns sea stars are resilient in heatwave conditions that bleach and kill corals DOI Creative Commons
Maria Byrne, Dione J. Deaker,

Mitchell Gibbs

et al.

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(23), P. 6493 - 6502

Published: Oct. 18, 2023

The juveniles of predatory sea stars can remain in their recruitment-nursery habitat for some time before ontogenetic shift to the adult and diet. These small are vulnerable a range factors with sensitivity amplified by climate change-driven ocean warming. We investigate thermal tolerance waiting stage herbivorous keystone coral predator, crown-of-thorns star (COTS, Acanthaster sp.), context degree heating weeks (DHW) model that predicts bleaching mass mortality. In temperature treatments ranging from +1 3°C prolonged heatwave acclimation conditions, exhibited ~100% survival DHW scenarios trigger (4 DHW), resulting mortality corals (8 DHW) extreme conditions well beyond those kill (12 DHW). This indicates juvenile COTS far more resistant than prey adults. higher activity (righting) metabolic rate after increased temperature. separate acute experiments, upper limit was 34-36°C. warming world, residing rubble nursery will benefit an increase extent this due have potential long-term persistence as herbivores they wait live recover becoming predators, thereby serving proximate source outbreaks on reefs already tenuous state change.

Language: Английский

Citations

6
Ocean warming lead to heat shock protein expression and decrease in the feeding rate of the Patagonian sea star Anasterias minuta DOI
Lorena P. Arribas, José E. F. Alfaya, M. Gabriela Palomo

et al.

Journal of Experimental Marine Biology and Ecology, Journal Year: 2021, Volume and Issue: 546, P. 151661 - 151661

Published: Nov. 1, 2021

Language: Английский

Citations

10
Immune and antioxidant responses of pearl oysterPinctada maximaexposed to acute salinity stress DOI Open Access
Haijun Wei, Mingqiang Chen, Zhenghua Deng

et al.

Aquaculture Research, Journal Year: 2022, Volume and Issue: 53(6), P. 2439 - 2447

Published: Feb. 6, 2022

Salinity change is a frequently occurring abiotic stress that dramatically affects the physiological and biochemical factors of marine bivalve molluscs. In this study, total 140 individuals Pinctada maxima were collected from Weizhou Island (Beihai, China) for 48-h acute salinity stress. Immune enzymes (phenoloxidase [POX], lysozyme [LZM] alkaline phosphatase [ALP]), antioxidant substances (superoxide dismutase [SOD] reduced glutathione [GSH]) measured at different times after low-salinity (salinity 20) high-salinity 40) with 30 as control group to assess effects on immune responses P. maxima. The results showed protein (TP), GSH, SOD, POX, LZM ALP silver-lipped pearl oyster significantly influenced by gradients duration (p < 0.05). TP, GSH recovered same level 48 h 40, p > 0.05), while only TP in indicating has stronger tolerance high (40) than low (20). study provides references exploring response mechanism its cultivation.

Language: Английский

Citations

7
Discordant pattern between realised and fundamental saline niches in two supralittoral Ochthebius species (Coleoptera: Hydraenidae) DOI Creative Commons
Juana María Mirón‐Gatón, María Botella‐Cruz, Antonio José García‐Meseguer

et al.

Ecological Entomology, Journal Year: 2022, Volume and Issue: 48(3), P. 284 - 294

Published: Dec. 9, 2022

Abstract Determining the saline niche of congeneric and co‐existing species that inhabit supralittoral rockpools subjected to extremely fluctuating conditions is a crucial concern understand their spatial distributions occurrence, predict ability face increasing environmental instability due climate change. Therefore, we compared realised fundamental niches Ochthebius quadricollis lejolisii (Coleoptera: Hydraenidae) on Mediterranean coast Iberian Peninsula. A was determined using field data abundance adults larvae both species. addressed with laboratory experiments by measuring survival egg‐hatching success exposed different salinity treatments (35, 60, 90, 110, 140 170 g L −1 ). Our study found discordant pattern between niches. Both are euryhalines support extreme fluctuations from 1.80 almost , O. in withstand up 180 . However, physiological tolerance greater than lejolissi survived at for more 3 days 30% success, whereas showed maximum time 2 no The eggs were tolerant adults. two studied exhibited high capacity tolerate salinity, which will be exacerbated

Language: Английский

Citations

6
Transcriptomic Signatures of Pearl Oyster Pinctada Maxima in Response to Acute Salinity Stress DOI Creative Commons
Haijun Wei, Mingqiang Chen, Zhenghua Deng

et al.

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: May 24, 2022

Acute salinity stress can impact many physiological processes of marine shellfish. The responses Pinctada maxima to stress, especially the osmotic pressure regulation and immune response, are great significance health. To investigate molecular changes in response acute pearl oysters were transferred from 30 ppt (C) 40 (HS) 20 (LS) for 12 h, transcriptome analysis was conducted on gills. Compared control, there 6613 (3253 up-regulated 3360 down-regulated) differentially expressed genes (DEGs), 4395 (2180 2215 DEGs observed HS LS, respectively. related biological potential functions explored enrichment analysis. A total 332 KEGG pathways (including 1514 genes) 308 731 enriched C vs. In addition, 1559 shared by group LS group, results function annotation showed that 7 involved membrane transport, 34 system. correlation network expression shows 3 significantly correlated with each other significant correlations between 27 response. this study will be value understanding basis adaptation oyster P. .

Language: Английский

Citations

4
Ecological consequences of supernumerary arms in eastern Pacific sea stars DOI

AL Bickell,

EG Lim,

Psalm Solomon Blaine Amos

et al.

Marine Ecology Progress Series, Journal Year: 2024, Volume and Issue: 739, P. 147 - 155

Published: May 13, 2024

Pentameric symmetry characterizes echinoderms and is most readily observed in sea stars. However, some pentamerous star individuals deviate from the normal 5-arm pattern, likely as a result of errors regeneration, but frequency these deviations their ecological consequences for are poorly understood. Here, we report extent pentamery multiple populations co-occurring species tested 3 potential advantages supernumerary arms—increased oral surface area, increased feeding, faster righting response—in 1 species, bat Patiria miniata . Using underwater surveys behavioural experiments at 16 sites Barkley Sound, British Columbia, Canada, found with atypical arm numbers 5 9 species. There were significant differences among site-specific mean percentages stars ranging 0.8 to 14.6% species-specific 0 10%. Bat had highest proportion arms, frequencies 25%. The probability feeding speed similar between without arms slightly larger areas given length, which could confer an advantage adherence substrate. Although appear be negligible, lack any clear disadvantage suggests that selection against variants might weak, leading limited on accuracy regeneration this

Language: Английский

Citations

0
Temperature and reduced pH regulate stress and biomineralization gene expression in larvae and post-larvae of the sand dollar Dendraster excentricus DOI
Tatiana N. Olivares-Bañuelos,

C.M. Gómez-Gutiérrez,

L.L. García-Echauri

et al.

Marine Biology Research, Journal Year: 2022, Volume and Issue: 18(3-4), P. 187 - 202

Published: April 21, 2022

Seawater temperature, oxygen, salinity and pH are important abiotic factors, changes in which can generate stress marine organisms. Subtidal intertidal species, such as the sand dollar Dendraster excentricus, daily exposed to stressors against they have developed survival mechanisms face environmental challenges. Analysing expression of some key genes response factors due temperature pH, especially early stages development, opens a window knowledge on effect that these benthos In present work larvae post-larvae D. excentricus were high low scenarios. Survival, size gene five genes, involved both (hsp70 IV hsp90 beta-like) biomineralization for skeletogenesis (sm29, sm30A, carbonic anhydrase 14-like mitochondrial proton/calcium exchanger protein LOC575637), analysed 4-, 6-, 8-arms, competent post-larvae. Survival stressed presented significant decrease, up 37% stages. A reduction almost 30 μm was observed when stressful conditions, except where no detected. After treatments, transcripts beta-like up-regulated all larval but hsp70 not. Under tested conditions sm29 sm30A down-regulated post-larvae, while LOC575637 expressions up-regulated. It is evident tolerance seawater has direct metabolic functions depends developmental stage. If laboratory results extrapolated ecosystems, it possible populations this structuring organism may be disturbed with subsequent damage ecosystem balance, until resilient organisms acclimatize adapt their changing habitats.

Language: Английский

Citations

0